Recent content by simon96c

Hi everyone, I am curious about how a neutral pion decays in two photons. I don't understand how it is possible since the pion has spin = 1 and the photons have spin = 1 as well: doesn't this mean that spin is not conserved in this decay? What am I missing? Another question I have is about...

Wouldn't I need two pairs of quark-antiquarks (one for each particle)? Or am I missing something?

I see. Just one last question: Why isn't a decay like W+ → π+π0 allowed? If I have considered all the quantities that need to be conserved correctly (which could easily not be the case) it should work, but still we know that it isn't allowed and I cannot find trace of it among the possible...

Ok, I think I get it now! By bonds I meant the binding energy, it's just that I think I have to clear my mind on the subject on a more general basis. Would you be able to suggest me a good introductory book for particle physics? Everything I have found right now it's either too simple (as in...

This may seem really silly from me, so I apologise in advance: how do I confirm that the energy-momentum is conserved? I clearly can't consider the rest mass only as there must some energy "used" to create the bonds to form the particles. Plus, I don't get why for particles such as the neutral...

Hello everyone, I've been wondering for a while how is it possible to determine which decays are possible from a particle or, given a decay be sure that the given decay is possible and hence draw a Feynman diagram of it. I know I have to take into account conservation charge, energy...

I've looked it up and now I think I have understood. Thank you for the answer!

I see. In fact, the book does not mention it and I'm realising why. So, since to get the formula I'm subtracting the two equations and I now that the RHS is zero, does this mean that E^2-(m_0*c^2)^2 = (cP)^2? This would explain why I could not get the correct final formula, but I'm still not...

Hello everyone, I have a question regarding a formula which can be derived from conservation of momentum and energy in the Compton effect. From conservation of momentum and energy during the collision of a photon with an electron, it is possible to get two expressions for the final energy E of...

That helped a lot! Thank you very much for your reply.

Hello everyone, I am currently studying traveling waves and reflection but I didn't understand a part of my last lesson. If we consider a string with a loose end and the other end attached to a wall we expect the string to have zero displacement at the wall and to have a reflected wave...